Fluid-gage.



. MARTIN.

FLUID GAGE.

APPLICATION FILBD JAN. so, 1907.

Patented Nov. 10, 1908.

PATENT OFi-itlli.

MORRIS MARTIN, OF MALDEN, MASSACHUSETTS.

FLUID-GAGE.

No. 9o3,212.

i i Patented Nov. 10, 1908.

fo all whom it may cancer n:

Be it known that I., Monms MARTIN, a citizen of the United States, residing` in Malden, connty of Midd esex, and State of Massachusetts, have invented an Improvement in Fluid-Geges, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawing representing like parts.

This invention has for its object the production of a novel fluid gage adapted for use with tanks 'of automobiles, motor-beats `and the like. i

The gage shown compris es a head, a magnetic pointer at the outer side of the head, a bearing at ,the inner side ofthe head sustaining a rock-Shaft provided with apermanent magnet, the rock shaft having connected 'with or eXtended from it a float-carrying arm, the magnetic pointer in practice being moved by the magnet over a dial exposed at the outer side of the head.

Figure 1 in face view shows my'novel gage i in one practical form, the gage being supposed tobe applied to the side of a tank, the figure showing the arm carrying the float in its extreme and middle positions; Fig. 2 is a sectional view looking downwardly, Fig. 1,

` showing the head and part of the float-carrying arm, the section bein' in the line x-x, Fig. l; Fig. 3 is a rear si e elevation of the head showing the hearing for the rock-shaft and 'the permanent magnet, togethei' with part of the float-carrying arm. In the drawings, A represents a tank containing fluid represented by the dotted line a', the bottom of the tank being re resented by b and the top by c. If the tan is Seven inches deep, a hole will be 'cut in the side wall thereof midway its top and bottom, and preferably in this hole I solder, clamp or rivet in any usual way a bushing e herein shown as threaded internally. This bush'ng receives the head f of the gage it having' an mperforate plate 12. The rear part of the head, see F 2 is shown as having external screw thr eads f The front side of the head has a chamber for the reception 'of a magnetic' 'pointer h that is mounted on a pin g' sutably sustained in said chamber in which is laid a dial, comprising, as shown in Figs. 1 and 2, a circular plate g and an overlying member of aluminum or celluloid marked to form a scale showing the letter E, indicating empty, and F indicating full ,and fractonal lines between which may show i, 71-, and, meaning onequarter, one-half, and' three-quarters full.

The dial g shown has an outwardly extendel pir. g having its end extended through the celluloid'or aluminum member overlyingsaid dial g that may be engaged, when the glass is removed, that the dial may be turned in the head, as will be described, should it be deemed desirable to do so, as is sometimes thecase. The dial is shown as maintained frict'ionally in contact with the outer side of the plat e 12 of the head by a ring h* entering a groove in said chamber, the chamber also having, as shown, a; shoulder to sustain a glass h that may be held in place by means of a clamping ring h 'shown as screwed onto the threaded outer end'of the head, but it will be understood that this glass may be held in position in any other usual or 'suitable manner.

The inner side of the head has an inwardly extended arm m constitutng a .bearingfixed to or forming part of the head, said bearng having a hole to receive a rock-shaft n, the latter sustaining at its inner end a permanent the up er portion of the c amber at the outer side o the head, and with the dial in such position it will be understood that the north pole of the magnet 72/ is arran ed to ocoupy' a position above the pin g' on which the magnetic'pointer is mounted, said north po e holding by its ma netism the south pole or arrow shaped hea of the magnetic pointer. Some users of agage of this sort desire to read the scale below the pivot'pn g', and in such event-the magnet h' will be turned say magnet h', said rock-shetit having also a lathalf way around on the rock-shaft n and the v pin g of the dial will be enga ed by hand after removing the -glass from the head and the dial' will be turned, placing the scale' thereon in the lower part of the chamber at the outer side of the head.

I believe that I am the first to make a gage head, which chamber receivesthe n'which a rock shaft having-a'float-.carrying arm and a magnet is sustamed in a hearing arranged at the mner sde of an mpervous head, said hearing occupying a position in a part of the in'er'sde of the head the fl'oatcarrying arm' movin verticallyciose tothe Wall ofthe tank to w 'eh the gage is applied,

I the magnet moving'in the space between the arm and'the inner side of the head. .32

The'magnet is free to be revolved in the fluid in'the'tank, but said fluid as well as fumes rising therefromis prevented from entering the chamber at the outer end of the l pin on which is loosely mounted the ma dle which is revolved over the ialin the chamberat the outer end of said head by the magnet as the osition of the magnet is changed due toc ange of level of gasoiene in the tank. i i i 'Having fully described my invention, what I claim as new and desi re to secure by Letters Patent is v 1. The combination with a vertical Wall of 'a tank and a bushing therein, of a gege-head mounted insaid' bushing and chambered at its opposite ende; a pivot mounted in one' of said chambes, a magnetic needle mounted on said pivot, a hearing sustained in the other chamber, a rock shaft mounted in said bearng, a magnet appled to the inner end of said shaft to be moved betweensaid bearing 'and the div'iding wall of said head, and a to' enter said bush ng, a pivot in the chamber at the outer end' ot said gage, a magnetc pointer mounted on said pivot, a hearing connected withthe inne! end of said head, a rock-shaft sustained in said hearing, a` 'ermanent magnet carried by said rock-s aft and adap'ted to be rotated betweensaid bearng and the' division wall of said head, and a fioat fixed to the outerend of said rock-shaft.

In testimony wherecf, I have signed my name to this specification, in the presence of two subscribing witnesses. e

` a MORRIS MARTIN. r v Witnesses:

GEO. W. GREGORY, EvANGELINE BROWN.` 

